泛型还是很省代码的,所以有必要学会!
参考博客:https://www.cnblogs.com/coprince/p/8603492.html
参考的具体内容:
我实际中使用:
1.无返回值方法
public void sortAction(List> userLabelListVOList, List classifyNames) {Map classifyRankMap = userLabelDubboService.queryLabelclassifiyByClassifyNames(classifyNames);for (CsUserLabelListVO csUserLabelListVO : userLabelListVOList) {csUserLabelListVO.setRank(classifyRankMap.get(csUserLabelListVO.getClassifiyName()));}ListUtils.sortByClassifyRank(userLabelListVOList);}
2.静态方法
public class ListUtils {public static void sortByClassifyRank(List> userLabelListVOList) {Collections.sort(userLabelListVOList, new Comparator>() {@Overridepublic int compare(CsUserLabelListVO o1, CsUserLabelListVO o2) {if (o1.getRank() > o2.getRank()) {return 1;}if (o1.getRank() == o2.getRank()) {return 0;}return -1;}});}
}
3.类中使用
@Setter
@Getter
@ToString
public class CsUserLotListVO implements Serializable{/*** */private static final long serialVersionUID = 1L;/*** 名称*/private String LotName;/*** 此分类名称下的lot*/private List csUserLotList;/*** 此分类名称在此次查询中的排名*/private Integer rank;
}
注意是一定要写的
泛型方法定义:写在public与返回值中间!!!!